3.4 Describe the Purpose of Software-Defined Wide Area Networking (SD-WAN) Solutions CYBERSECURITY-PRACTITIONER Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A logistics company has 30 branch offices connected via expensive MPLS links. The company is experiencing intermittent performance issues with its VoIP calls and needs to reduce WAN costs. The company wants to use cheaper broadband internet links but is concerned about link reliability. What is the primary benefit of SD-WAN that addresses this concern?

   • AIt compresses all data traffic to reduce the amount of bandwidth consumed.
   • BIt encrypts all traffic end-to-end, making broadband links as secure as MPLS.
   • CIt eliminates the need for any underlying physical transport by creating a virtual network.
   • DIt provides automatic failover and load balancing across multiple transport links.
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   Which statement correctly compares traffic handling in SD-WAN versus traditional WAN?

   • ATraditional WAN can use any available link, while SD-WAN is limited to MPLS
   • BBoth SD-WAN and traditional WAN require dedicated MPLS circuits
   • CSD-WAN only supports a single active link, while traditional WAN supports multiple
   • DSD-WAN can dynamically route traffic based on application needs, while traditional WAN uses static routing
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4. 3application · medium

   A company is deploying SD-WAN and needs to ensure that its branch offices can connect to the corporate data center and to the cloud. The company has MPLS and broadband links at each branch. What is the role of the SD-WAN edge device at each branch?

   • AIt acts as a central controller that manages all other branch devices.
   • BIt replaces the need for any physical transport links by creating a virtual network.
   • CIt terminates the overlay tunnels and applies local policies to steer traffic over the appropriate link.
   • DIt only provides a physical connection to the ISP and does not participate in routing decisions.
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5. 4foundation · easy

   Which component is responsible for centralized control in an SD-WAN architecture?

   • AThe SD-WAN orchestrator or controller
   • BThe SD-WAN edge device
   • CThe internet service provider
   • DThe branch router
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6. 5expert · hard

   A network architect is explaining SD-WAN to a colleague who is familiar with traditional WAN. The colleague asks, 'How does SD-WAN provide connectivity between sites if it uses the public internet?' What is the most accurate explanation?

   • ASD-WAN uses MPLS over the internet, providing the same security as a private network.
   • BSD-WAN replaces the public internet with a private network, so all traffic stays within a secure infrastructure.
   • CSD-WAN relies on the internet service provider to secure the connection between sites.
   • DSD-WAN creates a secure overlay network on top of the underlying transport links, using encrypted tunnels to provide secure connectivity.
   Reveal Solution Discussion Select an answer first